关于英语中主谓一致A football team which ---(keep) on training hard --

keeps,isa football team 是一个整体,which keeps on training hard这个定语从句里的which 指代的就是a football team,所以,用的是单数的谓语动词 keeps。is的话,是这个句子的谓语,主语仍然是a football team,所以,还是用单数。